How severe is CVE-2026-44511?

CVE-2026-44511 has a CVSS 3.x base score of 7.4, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2026-44511 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-44511?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-44511 have an EU (EUVD) identifier?

Yes. CVE-2026-44511 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30329.

When was CVE-2026-44511 published?

CVE-2026-44511 was published on 2026-05-14 and last updated on 2026-06-17.

CVE-2026-44511

CVE-2026-44511 is a high-severity vulnerability with a CVSS 3.x base score of 7.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-613.

Key facts

Severity: High (CVSS 3.x base score 7.4)
EPSS exploit prediction: 0% (10th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-30329
Weakness: CWE-613
Published: 2026-05-14
Last modified: 2026-06-17

Description

Katalyst Koi is a framework for building Rails admin functionality. Prior to 4.20.0 and 5.6.0, admin session cookies were not invalidated when an admin user logged out. An attacker with access to a valid admin session cookie could continue to access admin functionality after logout, until the cookie expired or session secrets were rotated. This vulnerability is fixed in 4.20.0 and 5.6.0.

Frequently asked questions

What is CVE-2026-44511?: Katalyst Koi is a framework for building Rails admin functionality. Prior to 4.20.0 and 5.6.0, admin session cookies were not invalidated when an admin user logged out. An attacker with access to a valid admin session cookie could continue to access admin functionality after logout, until the cookie expired or session secrets were rotated. This vulnerability is fixed in 4.20.0 and 5.6.0.
How severe is CVE-2026-44511?: CVE-2026-44511 has a CVSS 3.x base score of 7.4, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2026-44511 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-44511?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-44511 have an EU (EUVD) identifier?: Yes. CVE-2026-44511 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30329.
When was CVE-2026-44511 published?: CVE-2026-44511 was published on 2026-05-14 and last updated on 2026-06-17.

References

https://github.com/katalyst/koi/security/advisories/GHSA-4cx3-3c38-j9vv

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